Support for steam-turbine wheels.



No. 697,|2a. Patented Apr. 8; I902.

A. BDMGREN. SUPPORT FOR STEAM TURBINE WHEELS.

(Application filed Oct. 19, 1901.)

(No Model.)

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J OHAN AXEL BOMGREN, OF STOOKHOLM, SWEDEN, ASSIGNOR TO DE LAVAL STEAM TURBINE COMPANY, A CORPORATION OF NElV JERSEY.

SUPPORT FOR STEANI TURBINE WHEELS.

SPECIFICATION forming part of Letters Patent No. 697,128, dated April 8, 1902.

Application filed October 19,1901. Serial No. 79.189. (No model.)

T0 (6 whom (125 may concern:

Be it known that I, J OHAN AxnL BOMGREN, of J erla, Stockholm, Sweden, have invented a new and useful Improvement in WVheel-Supports, of which the following is a specification.

The object of the invention is to provide a broad and rigid support for a wheel, especially for that class of wheels-as, for example, a steam-turbine-which is ordinarily rotated at high velocities.

The invention consists in the combination, with a wheel having sockets on opposite sides thereof, of supporting shaft-sections having enlarged end portions constructed to enter and fill said sockets and means for rigidly connecting said shaft-sections to said wheel.

In the accompanying drawings, Figure 1 is a side elevation of the wheel, and Fig. 2 is a section thereof on the line 2 2 of Fig. 1.

Similar letters of reference indicate like parts.

A is the disk or body portion of the wheel, provided with a central hub, which may be integral therewith, as shown. When the wheel is used as a steam-turbine, it is also provided on its rim with buckets B, secured in place by expansion of their shanks in radial recesses or in any other well-known manner.

In the hub D E of the wheel are formed cylindrical sockets to receive the ends of the supporting shaft-sections C. At the ends of said shaft-sections are enlargements F G, which are of sufficient diameter and length to fit within said sockets and fill or very nearly fill the same. Upon said enlarged portions are formed flanges H I, which extend over the outer faces of the hub and are secured thereto by bolts J. This construction forms a very rigid and firm support for the wheel. The shaft-sections may be readily detached by the removal of the bolts J.

I am aware that flexible shaft-sections having at their ends flanges have been combined with the body portion of a steam-turbine wheel in which are sockets adapted to receive said flanged extremities, as shown in United States Letters Patent to O. G. P. De Laval, No. 431,749, July 8, 1890; but in this construction the enlarged portions necessarily do not fill the sockets, nor are the shaft-sections rigidly secured to the wheel, it being essential in said construction to combine with the enlarged portions means as described for per mitting the shaft-sections to be deflected out of line. Consequently said sections cannot have enlargements approximately equaling in depth the sockets in which they are placed; nor can said sections be rigidly secured to the wheel.

1. The combination with a wheel having sockets on opposite sides thereof, of the sup J OHAN AXEL BOMGREN. \Vitnesses:

WOLDEMAR BOMAN, I. A. VAN WART. 

